DULUTH - Authorities are still hunting a man who allegedly threatened to kill his girlfriend and provoked a SWAT standoff Thursday after he was believed to be armed and barricaded inside a Duluth apartment, police said Friday.

Roger Ray Crumblin, 32, was still at large Friday following a seven-hour SWAT standoff Thursday in which he was thought to be holed up in his girlfriend's apartment, located in the 5300 block of Sugarloaf Parkway, said Gwinnett police spokesman Officer David Schiralli.

Crumblin, who police believe is still in the immediate area, is wanted for allegedly threatening to kill his girlfriend with a knife, Schiralli said. He also faces charges in South Carolina of aggravated assault and battery with the intent to kill, authorities said.

Listed at 5 feet, 7 inches and 180 pounds with tattoos on both arms, Crumblin is considered armed and dangerous.

The woman, who remains unidentified for her safety, apparently left the state recently after Crumblin's alleged threat. She then called her attorney, who contacted Gwinnett authorities.

Police initially thought Crumblin had barricaded himself inside his girlfriend's home Thursday afternoon. With the permission of Crumblin's girlfriend, officers attempted to enter the residence with her key, but found the door was dead-bolted. Believing Crumblin was inside, police surrounded the complex and called Gwinnett SWAT. Once on the scene, SWAT deployed a robot inside the apartment to get a visual of the man. When that proved unsuccessful, a small team of SWAT officers raided the apartment, but were unable to locate Crumblin inside.

"It was learned that the suspect had dead-bolted the front door and left the apartment through the back before officers initially arrived," Schiralli said.

Before leaving the scene, officers received intelligence that Crumblin was still in the area. Gwinnett's crime suppression unit is actively searching the area.

Police are asking anyone who comes in contact with Crumblin to use extreme caution and call 911.